diff --git a/appimage/build_appimage.sh b/appimage/build_appimage.sh
index 1244921f0..c7588e097 100755
--- a/appimage/build_appimage.sh
+++ b/appimage/build_appimage.sh
@@ -339,7 +339,7 @@ case "$1" in
       missing_argument "$1"
     fi
     ;;
-  -*)
+  *)
     echo "Error: Unsupported parameter $1" >&2
     exit 1
     ;;